Improvement in boilers for hot-water heating apparatus



C. R. EL LIS.

Boiler for Hot-Water Heating Apparatus.

No. 129,542. I Patented luly 16,1872.

UNITED STATES PATENT QFFICE.

CHARLES R. ELLIS, 0F BROOKLYN, NEW YORK.

Specification forming part of Letters Patent No. 129,542, dated July 16,1872.

Specification of Boiler for Hot-Water Heating Apparatus, invented byCHARLES R. EL- LIS, of Brooklyn, Kings county, State of New York.

Steam-boilers have been made with vertical ranges of tubes over thefire, and boilers for hot-water apparatus have been made with verticalflues and water spaces.

My invention relates to a vertical water-circulating boiler, with rangesof lines around a central magazine or flue, and a regulatingdamper, bymeans of which the products of combustion can be partially directedthrough this vertical flue or entirely excluded from the same, accordingto whether the boiler is filled with fuel and the fire burning at thebase, or whether the central portion is employed as a heating-flue, inwhich case the damper will be opened; but, when used as a magazine, saiddamper will be closed; thereby this boiler is adapted to the variouscircumstances where it will be used, and there is in it a very largearea of heating-surface.

1n the drawing, Figure 1 is a vertical section of said boiler, and Fig.2 is a sectional plan at the line as a The grate a is above the ash-pitb and below the fire-box c, which may either be of fire-brick within ametal casin g, or it may be made hollow to contain water, and lined ornot with fire-brick. My improved boiler is made of a cylindrical orconical case, (I, with an inner casing, e, united by a flange at thebottom to the exterior case d, and extending up to the diaphragm f. Thenecessary opening is provided at g for a fire-door. At the upper end ofthe case at is a second diaphragm or head, h, and between thesediaphragms f and h are circular ranges of vertical tubes l l, formingflues that passthrough the water-spaces of the boiler. The vertical tubem over the center of the firechamber is of a size sufficient to act as amagazine to supply the fuel when used as a base-burner, or when fuel isnot introduced in such tube the heating-surface of the boiler isincreased thereby. The jacket n is provided with an escape-flue, o, andthe edge of the jacket is connected to the upper edge of the case d.Between the upper end of the tube m and the jacket n is a tight casing,o, witha valve or damper p; and r is a cover fitting tightly upon theopening in the jacket 0% that is above said tube m. When the damper 1)is open the products of combustion will pass up through the tube m, aswell as through the tubes Z, and escape by the flue 12; but when thisdamper p is closed there will not be any circulation of the heat throughthe tube m, and hence this tube is admirably adapted to use as afuel-magazine, because the water surrounding said tube m is notconfined, and is only about 212 Fahrenheit, and hence the fuel in themagazine will be kept at a low temperature. The cooler water enters ats, and circulates up through the boiler, and passes away by the pipe tto the heating-coil.

I claim as my invention The boiler for hot-water heating apparatus, madewith vertical flues surrounding the central tube m, in combination withthe casing 0 and damper 10, as and for the purposes set forth.

Signed by me this 2th day of June, A. D. 187 2.

CHAS. R. ELLIS.

Witnesses:

GEO. T. PINCKNEY, CHAS. H. SMITH.

